— 31 — 



Conclusions. 



On the whole the development of the Pedipalps 

 follows the types prevalent among other Arachnids, some- 

 times leaning more towards the one, sometimes more 

 towards the other class. It resembles 



(1) That of Spiders: — 



a. In the first cleavages (probably). 



&. In the egg-envelopes. 



c. In the general build of the blastoderm. 



d. In the development outside the mother animal. 



e. In the development of the lungs, heart, ali- 



mentary canal, and coxal-gland. 



(2) That of Solpugids and Pseudo-scorpions. 



a. In the development of the lateral organ. 



(3) That of Scorpions. 



a. In the development of the central nervous 



system. 



b. In the presence of an accessory brain. 



c. In the development of the median and lateral 



eyes. 



d. In the development of the lungs, heart, coxal- 



gland, and parts of the alimentary canal 



and Malphigian tubes. 

 The mode of development of several of the organs 

 is the same in Spiders as in Scorpions, for example, 

 heart, lungs, etc. 



Bibliography. 



1. Adensamer. — "Die Goxaldriise von Thelyphonus caudatus," 



'Zoolog. Anzeiger,' XVIII. 



2. Bernard. — Terminal Organ of the Pedipalpi of Galeodes, and the 



Discovery of a Homologous Organ on the Pedipilp of Phrynus," 

 'Ann. Nat. Hist.,' XII. 



3. Bernard. — "On the Spinning-glands of Phrynus, with an account 



of the so-called Penis, and of the Morphology of the Operculum," 

 'J. Linn. Soc.,' XXV. 



4. Bernard. — "The Comparative Morphology of the Galeodidse," 



J. Linn. Soc.,' XXV. 



5. Bertkau, Zu Lebidinsky. — 'Die Entwicklung der Coxaldriise von 



Phalangium," 'Zool. Anz.,' 1892. 



